Source: Denise Richards and her kids not HIV positive in wake of Charlie Sheen HIV reports

In the wake of the news that Charlie Sheen will appear on the Today show on Tuesday to address reports that he is HIV positive, a source tells ET that the actor's ex-wife, Denise Richards, and their two daughters, 11-year-old Sam and 10-year-old Lola, are HIV negative. The source adds that Sheen got infected after he and Richards split in 2006.

Other sources tell ET the claims that Sheen is HIV positive are true. The 50-year-oldformer Two and a Half Men star is set to make a "personal announcement" in an exclusive interview with the NBC morning program, where he will be live in studio.

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Source: Denise Richards and her kids not HIV positive in wake of Charlie Sheen HIV reports

NEW YORK, NY - JUNE 23: Denise Richards and Charlie Sheen watch the New York Yankees take on the New York Mets on June 23, 2012 during interleague play at Citi Field in the Flushing neighborhood of the Queens borough of New York City. (Photo by Elsa/Getty Images)

NEW YORK - MAY 14: Two and a Half Men cast member Charlie Sheen and his wife actress Denise Richards arrive for the 'CBS Upfront Previews 2003-2004' May 14, 2003 at Tavern on the Green in New York City. (Photo by Mark Mainz/Getty Images)

NEW YORK, NY - JUNE 23: Denise Richards and Charlie Sheen look for their seats as the New York Yankees take on the New York Mets on June 23, 2012 during interleague play at Citi Field in the Flushing neighborhood of the Queens borough of New York City. (Photo by Elsa/Getty Images)

BRENTWOOD, CA - JUNE 15 : (EXCLUSIVE) Actress Denise Richards marries Charlie Sheen in a top secret ceremony at a house June 15 2002 in Brentwood, California. (Photo by Mel Bouzad/Getty Images)

BEVERLY HILLS, UNITED STATES: Actor Charlie Sheen (L) kisses fiancee actress Denise Richards (R) after he won a Golden Globe Award for Best Performance by an Actor in a Television Series-Musical/Comedy for his role in 'Spin City' at the 59th Annual Golden Globe Awards at the Beverly Hilton in Beverly Hills 20 January, 2002. AFP PHOTO/Scott NELSON (Photo credit should read Scott Nelson/AFP/Getty Images)

Charlie Sheen and Denise Richards at the premiere of 'Undercover Brother' at the Universal CityWalk in Los Angeles, Ca. Thursday, May 30, 2002. Photo by Kevin Winter/ImageDirect.

Following Sheen's decision to appear on Today, a tabloid report surfaced on Monday claiming that the actor is HIV positive and has known about his diagnosis for the past four years. According to the reports, Sheen has allegedly "made the heartbreaking confession" to multiple individuals, and has already begun a regimen of medication meant to counteract the effects of the disease.

"What I can tell you is that if Charlie is indeed HIV positive and indeed owns it and comes forward, it can be a good moment," Hollywood publicist Howard Bragman told ET on Tuesday. "I'm sure it's a very hard personal moment. It takes a lot of courage on his part to talk about it."

ET has reached out to Sheen for comment. The actor, who is also father to a 30-year-old daughter and 6-year-old twin boys, has not responded.